Curated OER
Glencoe - Proportions and Similar Triangles
In this proportions and similar triangles learning exercise, students solve 14 multiple choice problems. Students find unknown sides of similar triangles using proportions. Students multiply means and extremes to solve proportions.
Curated OER
Cross Multiplying
For this cross multiplying worksheet, learners solve 21 equations. Students cross multiply and divide to isolate a variable.
Curated OER
Proportional Ratios
In this proportional ratios instructional activity, 9th graders solve 10 different problems that include sets of fractions in each. First, they determine if the product of the means is equal to the product of the extremes. Then, students...
Curated OER
Nine Examples for Tables, Pictographs, Mean. Median, and Mode
In this graphical representation of data and measures of central tendency worksheet, students calculate mean, median, and mode and answer questions related to graphs, tables, and pictographs.
Curated OER
Comparing Candy Bars
Eighth graders identify that a ratio is a comparison of two numbers and that a proportion is an equation that equates two ratios. They identify the extremes and means of proportions, as well as the product of the extremes equals the...
Oswego City School District
Regents Exam Prep Center: Mean Proportional in a Right Triangle
Material to supplement classroom instruction on mean proportional in a right triangle: a lesson with a definition of "mean proportional" as well as theorems with examples; an online multiple-choice quiz with answers; and guidelines for...
Texas Instruments
Texas Instruments: Confidence Intervals for Means
This set contains questions about statistics regarding confidence intervals for means. Students analyze the relationship, concerning means, between confidence levels and the length of confidence intervals.
Texas Instruments
Texas Instruments: Means & Variances of Random Variables
This set contains statistics questions regarding means and variances of random variables. The student calculates sums and differences of random variables based on their means and variances.
PBS
Pbs Teachers: Backpack Challenge
Enter personal data about the weight of your backpack in an online survey and note whether boys or girls carry the heaviest backpacks. Analyze the data for patterns and make conclusions.
CK-12 Foundation
Ck 12: Arithmetic: Proportions Using Cross Products
[Free Registration/Login may be required to access all resource tools.] In this lesson students identify proportions by cross multiplying or simplifying ratios. Students examine guided notes, review guided practice, watch instructional...
CK-12 Foundation
Ck 12: Arithmetic: Proportions Using Cross Products
[Free Registration/Login may be required to access all resource tools.] In this lesson students use cross products to solve proportions and find the value of the missing variable. Students examine guided notes, review guided practice,...
Texas Instruments
Texas Instruments: Determining Sample Size for a Given Margin of Error
This set contains questions about statistics involving how to choose a sample size to fit a desired maximum error bound. The student learns to do this on confidence intervals for proportions as well as confidence intervals for means.
Sophia Learning
Sophia: Equivalent Ratios: Lesson 5
This lesson will introduce the means and extremes of a proportion, and demonstrate how to use cross multiplication to determine if two ratios are equivalent. It is 5 of 8 in the series titled "Equivalent Ratios."
Sophia Learning
Sophia: Equivalent Ratios: Lesson 8
This lesson will introduce the means and extremes of a proportion, and demonstrate how to use cross multiplication to determine if two ratios are equivalent. It is 8 of 8 in the series titled "Equivalent Ratios."
Wyzant
Wyzant: Solving a Proportion
WyzAnt has a diagram that shows the means and extremes of a proportion. You will also find a brief description and examples for the means and extremes.
Wyzant
Wyzant: Proportion Basics
WyzAnt provides an explanation and examples on solving proportions. Proportions practice problems and a proportion calculator are included in this lesson.
Wyzant
Wyzant: Basics of Proportions
This tutorial from WyzAnt on proportions describes in detail the functions of proportions and includes several examples to demonstrate how to solve proportions. The tutorial is concluded with an interactive worksheet that allows for...